Merge pull request #1129 from quickfix-j/chrjohn-maven-badge

Correct Maven Central badge link

Author: chrjohn

README.md

@@ -2,7 +2,7 @@ QuickFIX/J
 ==========
 [![Java CI](https://github.com/quickfix-j/quickfixj/actions/workflows/maven.yml/badge.svg)](https://github.com/quickfix-j/quickfixj/actions/workflows/maven.yml)
 [![CodeQL](https://github.com/quickfix-j/quickfixj/actions/workflows/codeql-analysis.yml/badge.svg)](https://github.com/quickfix-j/quickfixj/actions/workflows/codeql-analysis.yml)
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.quickfixj/quickfixj-core/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.quickfixj/quickfixj-core)
+[![Maven Central](https://maven-badges.sml.io/maven-central/org.quickfixj/quickfixj-core/badge.svg)](https://maven-badges.sml.io/maven-central/org.quickfixj/quickfixj-core)
 
 This is the official QuickFIX/J project repository.